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Tyres 19" 18" Efficiency

  1. SageBrush

    From the Horse's Mouth: The Tyre Choice Efficiency Difference

    Trawling the EPA CSI website has its rewards. I found this nugget: At 50 mph, road load is 11.13/9.95 = 11.86% higher with the 19 inch tyres compared to the 18 inch. I presume the 18" are tested with the Aero covers on. The energy/mile penalty will increase at higher speeds.

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